The chiller is divided into two types: air-cooled chiller and water-cooled chiller. The chiller is divided into a low-temperature chiller and a normal-temperature chiller in temperature control. The room temperature is generally controlled within the range of 0 to 35 degrees. The temperature control of the cryostat is generally in the range of 0 degrees to minus 45 degrees.
In the chiller refrigerant recirculation system, the liquid refrigerant in the evaporator absorbs the heat in the water and begins to evaporate. A certain temperature difference is formed between the final refrigerant and the water, and the liquid refrigerant is completely evaporated to a gaseous state and then sucked by the compressor. Compressed, the gaseous refrigerant releases heat through the condenser, condenses into a liquid, and is throttled by the thermal expansion valve to become a low-temperature low-pressure refrigerant to enter the evaporator to complete the refrigerant recirculation process.